Php 如何获得确切的列数，循环语句

我正在做一个循环，显示一个有12列的表。它从数字1912开始，到2013结束。问题是，当它循环到1920时，它没有余数并开始一个新行。我需要获取代码，以便在第12列之后创建新行

这就是我得到的结果：

以下是我目前掌握的情况：

<?php
    $columns = 12;
    $Year = 1912;

    echo "<table width="755" border="1">";
    echo "<tr>";
    while ($Year <= 2013) {
        if (!($Year % $columns)) {
            echo "</tr><tr>";
        }
        echo "<td>$Year</td>";
        ++$Year;
    }
    echo "</tr>";
    echo "</table>";
?>

---

如果要每12列换行一次，只需跟踪当前列并使用该列确定何时结束该行（例如每12列）--

$col=1；
而（$年解决方案1
您需要为匹配的年份追加和前置列，如下所示：


下面是这样做的代码：

<?php
    $columns = 12;
    $startingYear = 1912;
    $endingYear = 2013;

    $realStartingYear = $startingYear;
    $realEndingYear = $endingYear;

    //Find the real starting year by going back a year until we hit the right one
    while ($realStartingYear % $columns) {
        $realStartingYear--;
    }

    //Find the real ending year by going forward a year until we hit the right one
    while ($realEndingYear % $columns) {
        $realEndingYear++;
    }

    echo '<table width="755" border="1">';
    echo "<tr>";
    for ($year = $realStartingYear; $year < $realEndingYear; $year++) {
        if (!($year % $columns)) {
            echo "</tr><tr>";
        }
        echo "<td>" . ($year >= $startingYear && $year <= $endingYear ? $year : "") . "</td>";
    }
    echo "</tr>";
    echo "</table>";
?>



如果还想显示其他列，只需更改

echo "<td>" . ($year >= $startingYear && $year <= $endingYear ? $year : "") . "</td>";

echo”“（$year>=$startingYear&&$year
您的第一个echo语句在语法上无效。很好！非常感谢。我是一名初学者，需要进一步熟悉PHP。如果您知道学习和练习的好资源，我将不胜感激。谢谢！继续学习，继续编程！在路上，您将找到许多好资源，就像您发现StackOverflow一样
<?php
    $columns = 12;
    $startingYear = 1912;
    $endingYear = 2013;

    $realStartingYear = $startingYear;
    $realEndingYear = $endingYear;

    //Find the real starting year by going back a year until we hit the right one
    while ($realStartingYear % $columns) {
        $realStartingYear--;
    }

    //Find the real ending year by going forward a year until we hit the right one
    while ($realEndingYear % $columns) {
        $realEndingYear++;
    }

    echo '<table width="755" border="1">';
    echo "<tr>";
    for ($year = $realStartingYear; $year < $realEndingYear; $year++) {
        if (!($year % $columns)) {
            echo "</tr><tr>";
        }
        echo "<td>" . ($year >= $startingYear && $year <= $endingYear ? $year : "") . "</td>";
    }
    echo "</tr>";
    echo "</table>";
?>

echo "<td>" . ($year >= $startingYear && $year <= $endingYear ? $year : "") . "</td>";

echo "<td>" . $year . "</td>";

<?php
    $columns = 12;
    $startingYear = 1912;
    $endingYear = 2013;

    echo '<table width="755" border="1">';
    for ($i = $startingYear; $i <= $endingYear; $i += $columns) {
        echo "<tr>";
        for ($j = 0; $j < $columns; $j++) {
            echo "<td>" . ($i + $j) . "</td>";
        }
        echo "</tr>";
    }
    echo "</tr>";
    echo "</table>";
?>